Talos Vulnerability Report

TALOS-2018-0747

April 25, 2019

CVE Number

CVE-2018-4062

Summary

A hard-coded credentials vulnerability exists in the snmpd function of the Sierra Wireless AirLink ES450 FW 4.9.3. Activating snmpd outside of the WebUI can cause the activation of the hard-coded credentials, resulting in a hard-coded, in the exposure of a privileged user. An attacker can activate snmpd without any configuration changes to trigger this vulnerability.

Tested Versions

Sierra Wireless AirLink ES450 FW 4.9.3

Product URLs

CVSSv3 Score

7.7 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H

CWE

CWE-798: Use of Hard-coded Credentials

Details

Sierra Wireless manufactures wireless communications equipment. They provide embedded solutions and wireless hardware solutions, including both the ES450 and GX450 devices. The AirLink ES450 is an LTE gateway designed for distributed enterprise. The ES450 is typically seen connecting point-of-sale devices, remote SCADA equipment, or other business-critical equipment. The AirLink ES450 also provides a terminal server for remote out-of-band administration.

Hard-coded credentials of sierra:12345678:abcdefgh are left in the snmpd.conf files for SNMP v3. This hard-coded user is active if snmpd is executed from outside of the web user interface. The sierra user has read-write privileges for the device.